OMAPL138如何在Linux下使用EDMA3驱动

yyj

$ y3 B2 F7 ]3 a9 N6 G0 r

1. [code]EDMA sample test application
   : O- l- W, E. \) H
2. /*
   
3. * edma_test.c
   ( t$ `/ C/ p( O4 h# Q# `! V
4. *
   - c& ]' v" f% x8 J) b
5. * brief  EDMA3 Test Application
   ( X, Y+ `$ o# o
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   - {0 j& X3 U+ |$ j
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    # S& ]4 M; x% |6 c3 P. G( Q
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    - h  m; p  ]4 I) _
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    7 O1 H# o. `  r8 v4 B
17. * published by the Free Software Foundation version 2.
    9 q1 e4 _! A1 a. R, u3 r! `6 K
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ' p+ b# I& b* N
22. * GNU General Public License for more details.
    + V" W+ R# A& o
23. */
    7 j1 q; W! c. s! W* W  u* Q. O- e& |2 c
24. 
    : y' o- a+ W; Y$ N% _
25. #include <linux/module.h>
    ) o* u2 M1 @9 _+ I+ T0 I* j
26. #include <linux/init.h>
    ) B* e- v1 r: B' M8 x3 n8 q
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    4 `& T6 e5 P# E2 I8 T
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    2 e) |# L% ]$ }4 c+ V" N# I
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ; L) f1 V: I5 `# x1 T' n/ K
35. 
    2 p( K; ~3 t$ p: M! j; d7 g4 S9 \
36. #include <mach/memory.h>
    + |& C! w  Y7 T, i) q' h7 j" I7 ]
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    + y& X) ?' Y& V2 ?
39. #include <asm/hardware/edma.h>
    ; N; t6 y. t$ m
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    ; Q' y0 V8 _0 i# Q+ S# C* q
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    2 a  B4 k# n2 G5 x; I6 \9 s
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    * ~8 Q, F7 O; ?
51. #define DMA_FN_OUT
    5 V4 G* \. L) R; ?5 ^! f" `
52. #endif
    ; N) b3 V, X9 E; l
53. 
    7 V! @% x& H/ H& A
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    2 Q/ `* k/ Z# O
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    % Q! o5 A% |' \2 W* E2 S9 Y
60. 
    0 h4 z; Q3 f5 w6 H, @* y
61. static volatile int irqraised1 = 0;
    9 u" {; g4 A2 c2 b* m6 [" V, e
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    " X' G9 i: X* [
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    % `' G( s/ }# j2 a5 L- H
72. 
    . P2 r) F8 t6 p# g
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    : L: Y& E9 u4 C+ g# M7 ]9 l
76. char *dmabufdest2 = NULL;
    . L; B1 f) A6 r1 |
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    / O1 c* b% v: {: D5 p- M$ r
80. static int ccnt = 8;
    " ?1 {5 O, F4 c2 K6 T3 m' @
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

6 m: x% O4 ^5 S
      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
4 X- f: E/ c5 I! |3 E! Tarm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
) L6 i  d! i# g- w! Y